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Vsevolod [243]
4 years ago
7

Calculus1 question on the photo.

Mathematics
1 answer:
Wittaler [7]4 years ago
5 0

Answer:

2π

Step-by-step explanation:

The revolved volume is hollow, so use washer method.  If we cut a thin, vertical slice, its volume is:

dV = π [ (cosh x)² − (sinh x)² ] dx

dV = π dx

Integrate between x=0 and x=2 to get the total volume.

V = ∫ dV

V = ∫₀² π dx

V = π x |₀²

V = 2π

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Anuta_ua [19.1K]

Answer:

si

Step-by-step explanation:

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4 0
3 years ago
A florist can make a grand arrangement in 18 minutes or a simple arrangement in 10 minutes. The florist makes at least twice as
Colt1911 [192]

Answer:

See explanation

Step-by-step explanation:

Let x be the number of simple arrangements and y be the number of grand arrangements.

1. The florist makes at least twice as many of the simple arrangements as the grand arrangements, so

x\ge 2y

2. A florist can make a grand arrangement in 18 minutes =\dfrac{3}{10} hour, then he can make y arrangements in \dfrac{3}{10}y hours.

A florist can make  a simple arrangement in 10 minutes =\dfrac{1}{6} hour, so he can make x arrangements in \dfrac{1}{6}x hours.

The florist can work only 40 hours per week, then

\dfrac{3}{10}y+\dfrac{1}{6}x\le 40

3. The profit on the simple arrangement is $10, then the profit on x simple arrangements is $10x.

The profit on the grand arrangement is $25, then the profit on y grand arrangements is $25y.

Total profit: $(10x+25y)

Plot first two inequalities and find the point where the profit is maximum. This point is point of intersection of lines x=2y and \dfrac{3}{10}y+\dfrac{1}{6}x=40

But this point has not integer coordinates. The nearest point with two integer coordinates is (126,63), then the maximum profit is

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8 0
3 years ago
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Step-by-step explanation:

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Answer:

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∠ BCD is an exterior angle of the triangle, thus

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Answer:

y = -4x +3

Step-by-step explanation:

the only thing you need from the equation is the slope, which is -4

y = -4x +3

3 0
3 years ago
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